package com.tony.study.thread;

/**
 * Created with IntelliJ IDEA.
 *
 * @Title: DeadLock
 * @Auther: 皮蛋布丁
 * @Date: 2021/10/31/20:47
 * @Description: 死锁：多个线程互相抱着对方需要的资源，然后形成僵持
 */
public class DeadLock {

    public static void main(String[] args) {
        Makeup g1 = new Makeup(0,"白雪公主");
        Makeup g2 = new Makeup(1,"灰姑娘");
        g1.start();
        g2.start();
    }
}
//口红
class Lipstick {

}
//镜子
class Mirror {

}

class Makeup extends Thread {
    //需要的资源只有一份，用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();
    int choice; //选择
    String girlName;    //使用化妆品的人
    Makeup(int choice,String girlName) {
        this.choice = choice;
        this.girlName = girlName;
    }

    @Override
    public void run() {
        //化妆
        try {
            makeup();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    //化妆，互相持有对方的锁，就是需要拿到对方的资源
    private void makeup() throws InterruptedException {
        if (choice == 0) {
            synchronized (lipstick) {   //获得口红的锁
                System.out.println(this.girlName+"获得口红的锁");
                Thread.sleep(1000);
            }
            synchronized (mirror) { //一秒钟后想获得镜子
                System.out.println(this.girlName+"获得镜子的锁");
            }
        } else {
            synchronized (mirror) {   //获得镜子的锁
                System.out.println(this.girlName+"获得镜子的锁");
                Thread.sleep(2000);
            }
            synchronized (lipstick) { //一秒钟后想获得口红
                System.out.println(this.girlName+"获得口红的锁");
            }
        }
    }
}
